Ashley Greene: "I'm Not Dating" Adrian Grenier

Twilight star Ashley Greene has not started dating Adrian Grenier, she tells

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The actress says the People magazine's report that she and the Entourage star "got super cozy all weekend" after meeting last Friday at a surfing event is not true.

"I don't know where that started from!" Greene told Us at the L.A. Lakers championship victory celebration on Thursday. "We ended up being at the same event and we were surfing, and we chatted and of course there happened to be a picture taken of that."

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She added, sarcastically: "And now we are dating!" The 22-year-old star admitted that she has yet to "really try" dating since becoming famous and finds the rumors frustrating.

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"It's kind of annoying sometimes because I have been linked to so many guys, but I have been single forever!" Greene told Us. "I'm just like, 'Ugh!' You get the calls too, like, 'Are you dating so and so?'"

She even has to alert family before the rumors get out of hand. "I usually call them and tell them before because I know what's going to come out," she told Us. "I'm like, I'm not dating them!'"